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← ScienceWhich outcome impairs efficiency when vapour compression cycles fail at subcooling?
A)Increased discharge line superheat occurs
B)Reduced liquid flashing results
C)Decreased volumetric efficiency results✓
D)Increased compressor power consumption follows
💡 Explanation
Decreased volumetric efficiency arises because diminished liquid subcooling reduces the refrigerant density entering the evaporator, and the compressor cannot displace as much mass. Therefore, refrigerating capacity drops, rather than improving line superheat from underfeeding issues.
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